Canon perpetuus op.10, 1968 – versia on the Martti Porthan Organ

Susanne Kujala plays Bach on Porthan Organ

Glass & Grigny on the Porthan Organ (SPb)

Organ Talk: "I just adore its flute stops" (Marina Väisä on the organ of the Mariinsky Concert Hall)

Olli Porthan - J.S.Bach, Gelobet seist du, Jesu Christ (BWV 604)

Olli Porthan - J.S.Bach Passacaglia (BWV 582/1). Part 1

Jan Lehtola plays "Vom Himmel Hoch" by J.S. Bach